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  • Specs718 · Boxster

Porsche 718 Cayman GTS PDK vs Porsche Boxster PDK: which is cheaper to run?

What each kilometre costs, depending on your driving profile and how you charge. Annual projection and cumulative savings over 10 years.

sports car · 2018 vs 2010 · 15,000 km/an · Mixed · Petrol 95 2.17 €/L · Methodology
Annual mileage
15,000 km
5,000 km50,000 km
Driving mix

30 % City · 50 % Road · 20 % Motorway

Fuel price
Petrol 95 2.17 €/L · Diesel 2.38 €/Lprix-carburants.gouv.fr — moyenne nationale du 05/10/2026 ; EDF Tarif Bleu Base au 01/08/2026 ; DC autoroute : moyenne des réseaux sans abonnement

Result · yearly energy cost

APorsche 718 Cayman GTS PDK

4,283 €per year

13,2 L/100 km weighted · 28.56 € per 100 km · 1 974 L per year

Gap123 € per yearin favour of the Boxster PDK (−3 %)≈ 57 L petrol 95
BPorsche Boxster PDK

4,160 €per year

12,8 L/100 km weighted · 27.73 € per 100 km · 1 917 L per year

The verdict changes with your usage
ProfileSplitAA · 718BB · BoxsterGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway5,575 €5,521 €Nearly level
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway4,283 €4,160 €Nearly level
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,516 €3,369 €148 € · Boxster

Cumulative saving for the Boxster PDK

1 year
123 €
3 years
370 €
5 years
617 €
10 years
1,233 €

Energy only. Excludes purchase, insurance, servicing, depreciation.

What produces these figures

WLTP combined
10.7 L/100 km · 10.1 L/100 km
Powertrain
Combustion · Combustion
Power
365 ch · 259 ch
Kerb weight
1,405 kg · 1,365 kg

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718 Cayman GTS PDK vs Z4 M40i

gap 2 430 €/year
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Boxster PDK vs Z4 sDrive30i

gap 2 834 €/year

Frequently asked questions

On a 100 km mixed trip, the Porsche 718 Cayman GTS PDK and Porsche Boxster PDK have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

The Porsche Boxster PDK is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.